GTUsGUY

Which one you will recomend for a semi daily driver. Is that I'm plannig on putting a black magic fan, with an under driven pulley and the water pump.

Evil Aviator

None.

You will need to totally rework your cooling system if you install an electric water pump. You will also need to fabricate an in-line thermostat housing if you want to be able to drive somewhere without taking 10 minitues to warm up your engine first.

I don't understand the underdriven pulley part. If you install an electric water pump, then you don't need a water pump pulley, and you would need a full-size alternator pulley to keep power to the electric water pump.

cymfc3s

its totally not worth it. Why replace something that doesnt go bad, with something thats complex, could fail and overheat your motor?

Merovign

If they're in Florida, they're probably running A/C, maybe P/S too... might want to underdrive just those.

Part of the problem with Import Performance is that the crossover between Import and Domestic ideas is pretty sparse - the domestic guys could learn a lot from us and we could learn a lot from them.

Someone, somewhere needs to do a dyno test on electric vs. stock water pumps on a rotary. Does the stok pump eat as much HP as on a larger engine? Less? More? How much HP loss driving the alternator harder?

Most domestic guys don't even run an electric water pump on the street, mainly on drag cars running the pump off the battery, not the alternator (small, low-drag alternators) for short runs.

I'm not even sure I know anyone who runs one on the street...

And what is it with people and Black Magic fans? I really want to know, I'm not just being sarcastic. By the numbers, they look pretty mediocre. Is there something I don't know?

GTUsGUY

about the fan, is the more relaible out there for the application and it moves 2800CFM. Also is one of the safest, won't cutt you a finger.

NZConvertible

Why?
There is an ideal speed to run a water pump at for maximum heat transfer. The pulley size is chosen by the factory so the pumps close to this speed as often as possible. Surely fitting an electric pump that runs at this speed constantly will improve cooling capacity.
Can you eleborate?

RETed

Most (aftermarket) electric water pumps (for V8's mostly) are NOT for street use; they are designed for short-term drag racing.

If you're still serious about using an electric water pump, Mezziere does make a 13B adapter kit that will use their electric water pump.



-Ted

Evil Aviator

Yes, but you do not always want maximum cooling! Cooling your engine too much will ruin it (or its performance) just as much as not cooling it enough. Also, it's not like you can just remove the mechanical water pump, bolt on an electric pump, and attach two hoses. It's much more complicated than that because of the design of the water pump housing. A thermostat of some type will be needed to keep the engine in its thermal operating range for street driving. Simply turning the electrical water pump on and off probably isn't a good idea because of the physical and thermal shock to the cooling system. I guess you could somehow rig a rheostat to run the electric water pump at different speeds, but this would be rather complicated, and electric pumps usually tend to be of the constant-rpm variety. An electric water pump is one of those race-only items which is not intended to see city traffic.